# Error ProcessingAPP

**URL:** <https://discourse.processing.org/t/error-processingapp/30965>\
**Category:** Electronics (Arduino, etc.)\
**Created:** [June 29, 2021, 4:25pm UTC](https://discourse.processing.org/t/error-processingapp/30965 "2021-06-29T16:25:01Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![salam\_ub](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/salam_ub/32/13752_2.png) [@salam\_ub](https://discourse.processing.org/u/salam_ub)\
**Post date:** [June 29, 2021, 4:25pm UTC](https://discourse.processing.org/t/error-processingapp/30965/1 "2021-06-29T16:25:01Z")

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Dear all,  
Once I try Pick Serial and click Connect, I got the error message below :

19:24:16 Serial connection start: detecte serial…  
19:24:16 Serial detected: COM3  
19:24:16 Serial connection attempt: COM3…  
java.lang.ArrayIndexOutOfBoundsException: 16  
at ProcessingApp$Communication.SerialRead(ProcessingApp.java:1002)  
19:24:18 Serial connection failed: detected serial, no serial responded  
at ProcessingApp$Communication.StartSerial(ProcessingApp.java:942)  
at ProcessingApp.processEvent(ProcessingApp.java:587)  
at ProcessingApp.processEvent(ProcessingApp.java:113)  
at ProcessingApp.draw(ProcessingApp.java:94)  
at processing.core.PApplet.handleDraw(PApplet.java:2482)  
at processing.awt.PSurfaceAWT$12.callDraw(PSurfaceAWT.java:1547)  
at processing.core.PSurfaceNone$AnimationThread.run(PSurfaceNone.java:313)

Your help is highly appreciated  
-SALAM

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<div class="post-metadata">

**Author:** ![th75](https://avatars.discourse-cdn.com/v4/letter/t/ebca7d/32.png) [@th75](https://discourse.processing.org/u/th75)\
**Post date:** [June 29, 2021, 11:24pm UTC](https://discourse.processing.org/t/error-processingapp/30965/2 "2021-06-29T23:24:19Z")

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hi,

it looks like a code looping to search a serial  
but it s very difficult from the error message alone,  
if you can share your code here, i will have a look

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**Author:** ![jafal](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/jafal/32/19112_2.png) [@jafal](https://discourse.processing.org/u/jafal)\
**Post date:** [June 30, 2021, 3:16pm UTC](https://discourse.processing.org/t/error-processingapp/30965/3 "2021-06-30T15:16:08Z")

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If you open Arduino ide and it was connected to Arduino processing won’t find com

Try to include your scketch manual selection of com port and post your code here